Mitigation of subsynchronous oscillation in a VSC-HVDC connected offshore wind farm integrated to grid

Zhou, Qibin; Ding, Yang; Mai, Kun; Bian, Xiaoyan; Zhou, Bo

doi:10.1016/j.ijepes.2019.01.031

Cited by 22 publications

(11 citation statements)

References 14 publications

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“…The SSTI between the DFIG based wind farm and modular multi-level converter (MMC)-based HVDC system is explored by authors [64]. Further studies on SSTI have been carried out in Reference [65][66][67][68][69].…”

Section: Ssrmentioning

confidence: 99%

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Din

Zhang

Zheng

et al. 2022

IET Renewable Power Gen

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In recent years, the wind energy conversion system faces significant challenges for stable and secure operations, especially in the weak grid due to high penetration of wind energy into the grid. Doubly fed induction generator (DFIG) is one of the most popular wind turbine generators due to its cost‐effective variable speed and low‐cost partial size power converter. Impedance interaction between series or parallel compensated weak grid and the DFIG system causes sub‐synchronous resonance (SSR) and high‐frequency resonance (HFR). A comprehensive review of the state‐of‐the‐art SSR and HFR in the DFIG system under a weak grid is presented. First, based on features, such as supplementary hardware, linear and non‐linear control strategies, the resonance damping techniques are classified into different types. Then, the advantages and disadvantages of SSR analysis and damping techniques techniques are put forward. Moreover, the latest development of state‐of‐the‐art SSR and HFR analysis and damping techniques are supplemented. Finally, the contemporary and future trends of the SSR and HFR techniques are discussed.

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Section: Ssrmentioning

confidence: 99%

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Din

Zhang

Zheng

et al. 2022

IET Renewable Power Gen

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“…In 2013, an SSO around 20 Hz occurred in the Nanao VSC-HVDC project in China and led to the outage of the integrated DFIG-based wind farms (Lyu et al, 2018). In addition, a 250-350 Hz current oscillation was observed in the North Sea VSC-HVDC project in Germany from the converter to the grid (Christoph et al, 2015;Zhou et al, 2019). Similarly, for the proposed system, the interaction between the DFIG-based wind farms, local grid, and VSC-HVDC may cause a new type of electrical oscillation issue, which is worthy of further study.…”

Section: Introductionmentioning

confidence: 99%

Impedance Modeling and Analysis of Medium-Frequency Oscillation Caused by VSC-HVDC Connected to Local Weak Grid and DFIG-Based Wind Farms

et al. 2021

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In the northwest of China, a strategy to transmit the wind-thermal–bundled power from the local grid and doubly fed induction generator (DFIG)–based wind farms through a voltage source converter–based HVDC (VSC-HVDC) can be widely applied. However, since the local grid is usually weak, a new type of electrical oscillation in the medium-frequency region may occur in the sending-end converter (SEC) of VSC-HVDC with PQ-control. The mechanism of this oscillation caused by the interaction between the DFIG, local grid, and SEC is not entirely understood. In this study, the sequence impedance model of the sending-end converter (SEC) of VSC-HVDC with the PQ-control outer loop and PLL is derived with the explicit analytic expression, and then, the oscillation mechanism is explored based on the intuitive analysis of the system impedance frequency characteristics. Compared with the subsynchronous oscillation (SSO) caused by the DFIG or power inverter, the theoretical analysis shows that this medium-frequency oscillation (MFO) mainly originates from the SEC due to its negative damping effect between about 100 and 200 Hz. In addition, the impact of the system controller parameters and operating conditions of the DFIG, local grid, and SEC on the oscillation characteristics is analyzed in detail. Finally, the correctness of the theoretical analysis is validated by time-domain simulation.

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“…These strategies can be categorized into two types of conventional control methods and advanced intelligent control methods. In addition, in terms of stability oscillation, they can be classified into several categories of power/frequency oscillations, subsynchronous oscillations, and direct current (DC) oscillations [7][8][9][10]. Mathematical modelling and AC/DC interaction analysis of HVDC systems are studied in [11].…”

Section: Introductionmentioning

confidence: 99%

HVDC grids stability improvement by direct current power system stabilizer

Azizi

CheshmehBeigi

Rouzbehi

2021

IET Generation Trans & Dist

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High-voltage direct current breaker is among the essential components of high-voltage direct current grids. Such a breaker generally needs a direct current reactor to reduce the fault currents rate. However, direct current reactors have destructive effects on the multiterminal high-voltage direct current grid dynamic stability, and in such a system, despite the variety of controllers, the system dynamics are highly sensitive to the operating point. Therefore, additional damping control will be needed. This paper proposes a modification to be applied to the traditional droop controller of high-voltage direct current grids to cope with the influence of these large reactors, improving the direct voltage stability and decreasing power variations in the transient events by introducing a direct current power system stabilizer. The proposed method for direct voltage control has been investigated through the analytical model of the system. Stability improvement has been studied following the application of the proposed method by investigating zeros, poles, and frequency response analysis. Moreover, a method is proposed for optimal design and optimal placement of direct current power system stabilizer. The system analysis and time-domain simulations demonstrate a decent damping improvement attained by the proposed method. All simulations and analytical studies are conducted on Cigré DCS3 test high-voltage direct current grid in MATLAB/Simulink.

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Mitigation of subsynchronous oscillation in a VSC-HVDC connected offshore wind farm integrated to grid

Cited by 22 publications

References 14 publications

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Recent development and future trends of resonance in doubly fed induction generator system under weak grid

Impedance Modeling and Analysis of Medium-Frequency Oscillation Caused by VSC-HVDC Connected to Local Weak Grid and DFIG-Based Wind Farms

HVDC grids stability improvement by direct current power system stabilizer

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